Search found 1984 matches

by Glenn Brooks
Tue May 26, 2020 11:39 am
Forum: Milling Machines
Topic: Fly Cutter Problems
Replies: 12
Views: 454

Re: Fly Cutter Problems

Yes, I expected the cross hatch pattern, and viewed that part as normal. The roughness is left by the back side of tool- passing around the rear path of the spindle. And by roughness I mean rough enuf to catch at a shop rag and pull small, fine lint off the rag when cleaning up the work. If this wer...
by Glenn Brooks
Mon May 25, 2020 10:23 pm
Forum: Milling Machines
Topic: Fly Cutter Problems
Replies: 12
Views: 454

Re: Fly Cutter Problems

Pete, Harold and all, Thanks for the comments. Good discussion. I am using HSS tooling... the cutting edge did show some signs of wear and rubbing on the bottom, so reduced speed from 312 to 80 rpm, as Pete suggested. Made a world of difference in the finish - even with the degraded edge. Still gett...
by Glenn Brooks
Sun May 24, 2020 12:45 am
Forum: Milling Machines
Topic: Show us your milling machine!
Replies: 309
Views: 154191

Re: Show us your milling machine!

Use it all the time, particularly when cutting threads.
by Glenn Brooks
Sat May 23, 2020 7:32 pm
Forum: Milling Machines
Topic: Show us your milling machine!
Replies: 309
Views: 154191

Re: Show us your milling machine!

My Burke #4. Sort of a baby Cincinnati. 3 3/4” x -16” table. 1” arbor. This one made in 1940.
by Glenn Brooks
Sat May 23, 2020 4:05 pm
Forum: Milling Machines
Topic: Fly Cutter Problems
Replies: 12
Views: 454

Fly Cutter Problems

Guess I need some advise on fly cutters. I’ve been trying to level and finish surface a 6” x 10” bit of 1” plate to use as a base for a shop made tapping fixture. Decided to try a 2.5” fly cutter that’s been laying around in my tooling cabinet for a couple of years. Several problems showed up: 1) ea...
by Glenn Brooks
Mon May 18, 2020 6:09 pm
Forum: Milling Machines
Topic: Repairing Bridgeport servo power feed
Replies: 3
Views: 247

Re: Repairing Bridgeport servo power feed

Thanks. Turns out mine is the old model 90, not a Servo 140. Just found an inspection plate with the model #. Earlier configuration. It has a Rube Goldberg retaining arm inside the housing that bolts down through a side plate to the inside of the housing. This arm was holding the assembly inside the...
by Glenn Brooks
Mon May 18, 2020 1:09 pm
Forum: Milling Machines
Topic: Repairing Bridgeport servo power feed
Replies: 3
Views: 247

Repairing Bridgeport servo power feed

My Bridgeport clone Servo 140 table feed(right hand side drive) lost its power cord yesterday. One of the wires pulled loose from the bottom of the housing. I can’t figure out how to remove the innards without damaging the parts. I loosened the bottom housing. Took out the four screews, pulled the n...
by Glenn Brooks
Sun May 17, 2020 1:02 pm
Forum: Live Steam
Topic: Silver soldering set up
Replies: 16
Views: 969

Re: Silver soldering set up

On a related note, Builder01 mentioned heating only the copper, which I agree with. However it can Become annealed, and turn soft... i recently solder up some 45* copper pipe fittings to form a 90* angle. The fittings became annealed and very soft. Collapsed when I tried to install. In these cases, ...
by Glenn Brooks
Sat May 16, 2020 1:11 pm
Forum: Grand Scale Railroading
Topic: 12" working railroad
Replies: 631
Views: 155285

Re: 12" working railroad

The Square edges are certainly stress risers, multiplied by millions of ton miles of high speed service for each fright car wheel. Also I think the freight car wheels take enormous amount of abuse in freight yards, constantly striking switches, frogs, and guard rails. Seems like there may be consist...
by Glenn Brooks
Fri May 15, 2020 12:11 pm
Forum: Build Log
Topic: Front End Rebuild
Replies: 36
Views: 7382

Re: Front End Rebuild

Final overall configuration of steam plumbing, Lempor, and stack. Cement patch in the bottom of the tube is drying. Looks like the flues are going to be much more accessible for cleaning. Trying to figure out if the local Napa store has curb side delivery for a rattle can or two of charcoal grey hi ...
by Glenn Brooks
Fri May 15, 2020 12:03 pm
Forum: Grand Scale Railroading
Topic: 12" working railroad
Replies: 631
Views: 155285

Re: 12" working railroad

Ryan, I missed that part about the outside edge. Don’t know why the IBLS is .125. Unless they anticipate some outside edge contact with guard rails or frogs, etc. I’d probably increase the radius a bit more just for GP, and ease of handling on the fingers etc, when man handling the wheels and cars d...
by Glenn Brooks
Fri May 15, 2020 1:42 am
Forum: Grand Scale Railroading
Topic: 12" working railroad
Replies: 631
Views: 155285

Re: 12" working railroad

Ryan, ideally, the rail profile should match your flange profile. E.g. same radius. groovy track bar has a pretty tight radius, so the smaller the radius probably the better. 3/32” is probably good to go. The theory for the flange radius is the radii forces when the truck wheels start to hunt off to...